What is High Sensitivity ?
Some TTY’s are equipped with two levels of sensitivity, normal and high. When incoming messages become garbled, it may indicate a weak telephone connection. You can convert from normal to high sensitivity in order to increase the TTY’s ability to become more sensitive to the incoming signal. Change from normal to high sensitivity by holding down the SHIFT key and pressing the S key. HIGH SENSITIVITY will be momentarily displayed. The TTY will automatically reset to normal sensitivity when the unit is turned off.